Passive House Flat Roof

It grew out of the superinsulation movement after all.

Passive house flat roof.

If you re familiar with any passive house projects you may be thinking about double stud walls that are a foot thick or regular walls with 6 to 12 inches of rigid insulation on the outside. Passive house is designed so that most of the air exchange with exterior is done by controlled ventilation through a heat exchanger in order to minimize heat loss or gain depending on climate so uncontrolled air leaks are best avoided. The following article was produced and published by the source linked to above who is solely responsible for its content. How builders are tackling unvented flat roofs in passive houses.

The polyurethanes passive house roof will be prefabricated to directly integrate polyurethane foam insulation into the roof structure. To achieve the passivhaus standard passive roofs need high levels of insulation thermal bridges need to be eliminated and the structure itself needs to be airtight. The roof maker passive house flat rooflight. Passive house drives both innovation and design with a focus on energy efficiency and a carbon neutral offering.

The main diagram below shows how the three passive elements roof wall and foundation link together. Regardless of how new or modern a house is there is a good chance that it will be topped off with a flat roof now but if you can t picture how great they look we. Ask any architect and they ll tell you that hardly any other type of architecture is as timeless and modern as that of flat roof houses. Passive house buildings have been described as the most comfortable due to them offering excellent thermal performance and exceptional airtightness.

All mbc passive roof systems deliver a u value of 0 10w m2k. Alwitra flat roof details. It should come as no wonder then that these are experiencing a serious comeback right now. Blockfoam panels will be inserted between the rafters integrating insulation directly into the roof structure allowing for better air tightness.

Journal of light construction march 25 2016. Speaking to passive house plus the company s hugh whiriskey emphasised that with more and more designers now specifying vapour control membranes in flat roof constructions it is crucial each roof structure is correctly designed to prevent any moisture issues from arising. Passive house has a reputation for requiring ungodly amounts of insulation. The individual roof type diagrams show the detail associated with each roof type.

This means the heating requirement is reduced to the point where a traditional heating system is no longer considered and therefore protects consumers from ever increasing fuel prices. The irish standard part l 2011 for a traditional roof structure is 0 16 w m2k.